. >>> researchers in china found a way to create blood cells using urine. researchers hope to one day use the new technique to treat diseases such as alzheimer's and parkinson's. >>> san francisco renters could soon find out ahead of time if they will be living next door to smokers. san francisco's board of supervisors could soon require landlords to give potential tenants a list of apartments where smoking is allowed. a city committee approved a plan and the board is expected -- board is expected to vote on it next ban. >>> 7:23. where is the smartest city in north america? one website says san francisco is the second smartest city. san francisco has a lining entrepreneurial economy -- this rhining entrepreneur economy, the report says, but they say it is near colleges and universities. behind san francisco are seattle and vancouver. >>> 7:23. we want to check in with sal. see what's happening on the roads. sal? >> yeah. boston has harvard. >> right. >> let's take a look at what we have. it's cambridge, technically. but you know what i mean. southbound 880